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{"ops":[{"insert":"1. What two concepts are ER modelling based on?"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"2. The database in Figure 8.11 is composed of two tables. Use this figure to answer questions"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"DIRECTOR"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"DIRNUM"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"100"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"101"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"102"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"DIRNAME"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"J.Broadway"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"J.Namath"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"W.Blake"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"DIRDOB"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"01\/08\/39"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"11\/12\/48"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"06\/15\/44"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"PLAY"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"PLAYNO"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"1001"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"1002"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"1003"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"1004"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"1005"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"1006"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"1007"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"PLAYNAME"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Cat on a cold bare roof"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Hold the mayo, pass the bread"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"I never promised you coffee"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Silly putty goes to Texas"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"See no sound, hear no sight"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Starstruck in Biloxi"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Stranger in parrot ice"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"DIRNUM"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"102"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"101"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"102"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"100"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"101"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"102"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"101"},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"Figure 8.11. Director and Play tables for question 2, by A. Wott."},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"2.1 Identify the primary key for each table. 2.2 Identify the foreign key in the PLAY table."},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"2.3 Identify the candidate keys in both tables."},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"2.4 Draw the ER model."},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":""},{"insert":"\n"},{"insert":"2.5 Does the PLAY table exhibit referential integrity? Why or why not?"},{"insert":"\n"}]}
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